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red 8 mm tubes
I'm facing trouble with 8 mm neon filled tubes, and electronic
trnsformers ( local made )
The tubes seems alright after aging they turn red as it should be , but
some of the not all of them , when connected to the elctronic transf.
after a while they go pinkish as if they were not properly aged.
any suggestion.
I changed the filled press. started with 14 mm Hg, and ended at 9 mm
Hg, also changed electrodes, but I really don't know what the F.
Mario
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